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Finding the Fourth Proportional to 389,634.28, 584,484.70 and 136,892.68

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Solution

The fourth proportional to 389,634.28, 584,484.70 and 136,892.68 is: 205,350.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,634.28 : 584,484.70 = 136,892.68 : x
  2. Step 2: Convert to fraction form
    389,634.28/584,484.70 = 136,892.68/x
  3. Step 3: Cross multiply
    389,634.28x = 584,484.70 × 136,892.68
  4. Step 4: Simplify right side
    389,634.28x = 80,011,677,002.00
  5. Step 5: Solve for x
    x = 80,011,677,002.00/389,634.28
  6. Step 6: Final answer
    x = 205,350.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.